Well pump



.um 2.1, 1921s.

.Al B; STEEN WELL. PUMP Filed ot. 422, 1921 l Patented .15.11.27, 1925.

UNITED STATES ARTHUR B. STEEN, OF HOUSTON, TEXAS', ASSIGNOR TO THE 'TEXAS COMPANY, A

CORPORATION' oF TEXAS.

WELL PUMP.

Application filed October 22, 1921.

, to mechanism connected therewith and has special reference to apparatus adapted for.

- use in pumping oil, water, and other fluids from deep wells. One object of the invention is to provide suitable packing for the pump capable of forming an effective seal and embodying certain structural advantages as will presently be set forth.

A further object is to provide packing means of such nature that it may, when occasion requires, be readilyremoved from the well.

With the above and other objects 1n view, the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this speciiication and illustrated in the accompanying drawings, wherein:

Figure 1 is a longitudinal view partly rn elevation and partly in section of an apparatus constructed in accordance with the invention and constituting an .embodiment thereof.

Figure 2 is a section in detail of the packer drawn to a larger scale than that of Figure 1.

Figure 3 is a section of the well caslng showing in elevation a portion of the pump plunger and the outlet valve therefor.

Inv the drawings 10 represents the well casing which extends from the ground surface down into the bore of the well and is made up of a plurality of pipe sections joinedby couplings 11. In drilling wells it is customary to make a hole of a given diameter for a certain distance and then continue the drilling with a bore of less diameter extending to the oil bearing strata. The casing l()` is therefore shown as terminating with the fitting 12 which rests at the bottom of the upper bore of the well. A casing 13 of less diameter than the pipe 10 extendsinto the lower bore of the well. The upper end of the pipe 13 extends uppression member 16 vto which the member 16 is Serial No. 509,581.

wardly a given distance within the casing 10, as clearly shown in Figures 1 and '2. The casing 13 is composed of a number of sections of pine which may` be attached by means ofl threaded joints 14. A valve rod 15 extends downwardly through the casings 10 and 13 and at its lower end has a shoulder 27 by means of which it is suitably c'onnected to the usual plunger 28 in a manner well known in the art. The upper endof the valve rod islikewise suitably connected to a cable (not shown) which extends to the surface and is in turn connected to mechanism by which the pump is operated. The valve rod moves within the tubular member 18 of the packer.

As illustrated in detail in Figurev 2 the packer for the the casing 10 at the p ipe 13 and includes a tubular or coniwhich is threadedly attached to the pipe 13 and is provided with a seat at 17 for a tubular member or bushing 18. The latter member has an annular shoulder portion 19 at its upper end from which the tube has an inward taper both externally and internally toapproximately the point where it is seated on the member 16. Below the taper is a substantially straight tubular portion 20 to the lower end of w ich is attached a collar 21. A sprin 22 is positioned in the annular space between the tubular member 20 and casing 13. the spring being interposed between the member 16 and collar 21. The member 16 has an upwardly extending portion 23 which bears against the packing material 24 placed between the shoulder 19 and between the flared portion of the tube 18 and the pipe 10. lfVhenletting the packer down into the well the weight of the casing 13, attached operates to compress the spring 22 and relieve the packing from compression permitting the packer to be readily lowered into the well. When the casing has reached bottom the pump is mounted within weight is taken off the spring 22, the tension the upper termination of of which then operates to pull the member 18 downward thereby placing an initial compression on the packing so that a seal may be effected. After pumping has started the pressure of'the iiuids within and on top of the tube 18 acting downward is suficient to compress the packing-suyas to make a tight seal. The members 18 and 16 fare; preferably equipped with threads at and 26,.respectively, for the attachment of fishing tools. ,v

`he fluid is conducted from the casing 13` hrough the. packer to the casing 10 by y which it is conveyed to the surface.

- As pointed out hereinbefOre the packer is soA constructed that the packing material lis not under compression while the packer is being lowered and it furthermore is so de-v signed that as soon as the casing rests on the bottom of the bore the pressure on the con-` troll. spring is released so that an initial pressure'i'may be exerted by the spring on the packing material to cause a seal to be made before the pressure of the fluids within the casing become available.

resides in the facility with which it may be v removed from the well. If the valve rod 15 is moved upwardlyl until the shoulder portion 27 at its end comes in contact with the collar 21 pressure is thereby exerted upon the spring 22 and the packing is thus relieved of compression so that the packing `1nechanism may readilybe withdrawn from the casing.

Apparatus of preferred form and construction has been illustrated and described for the purpose of showing a way in which this' invention may be used, Vbut the inventive thought upon which the application is based,`

is broader than the illustrative embodiment \hereof, and I therefore intend no. limitapended claims.

i memberrattached to the upper end of 4the Ain ions other than those imposed bythe apwhat r Claim is:

s l.' A\pump packer for oil -wells having an inner casing and an outer casing of larUer size exte ding over the upper end of the 1nner casinlg, comprising a' bushing within the inner vcasing and extending into the outer casi :fr and provided with anannular en Y large ent at its upper end, a compressible packin" between the upper end of the bushing' and the outer casing, a compression nerf=casing, and means for yieldingly forcingthe bushing to compress the packing against the outer casing to form a seal.

2. A pump packer for oilwells having an inner casing and an outer casing of larger size extending over the upper end of the inner casing comprising a bushing within u A further advantage of my improved typeof packing the inner casing relieves compression on the packing until the inner casing sets cn the bottom of the well.

3. A pump packer for oil Wells having a relatively large casmg and a smaller casing extending a short distance into the large casing, comprising a bushing overlapping 'the 'end of the smaller casing and having a lateral shoulder, packing means interposed between one of the casings and the bushing adjacent to said shoulder, a compression memberon the other casing, and yieldinoY means for forcing the bushing longitudine ly to compress the packing to form a seal.

V4. A pump packer for oil wells havin a relatively large casing and a smaller casing extending a vshort distance into the large casing, comprising a bushing overlapping the end of the smaller casing and having a lateral shoulder, packing means interposed between one of the casings and the bushing adjacent to said shoulder, a compression member'y on the other casing-and yielding means for forcing the bushing longitudinally to compress the packing against the larger casing to form a seal, the arrangement being such that the weight of one of the.

casings will release pressure on the packing until said casing is set lin position on the bottom of the well.

5. In apacker for well pumps having an upper casing and a lower casing terminating at its upper end within the lower end of the upper casing, packing means arranged to form a seal between the two p casings and comprising a tubular member secured to the upper end of the lower casy ing and provided with an inclined seaty on' its inner periphery, an elongated bushing tapered throughout a portion of its length and .having an' annular shoulder on its upper end adapted to abut against the upper-casing, said bushing being partially supported bythe seat within the tubular member, packing means disposed around the tapered portion of the bushing between the annular shoulder and the upper end of the tubular ,member, and a spring disposed around and secured to the lower end of the bushing for forcing said bushing downwardly to compress the packing material positioned around its tapered end against `the upper casing to form a seal. l

6. In a packer for well pumps having au upper casing and a lower casing terminating at its upper end within the lower end of the upper casing, adjustable packing means arranged to form a sealbetwccn the two casings and comprising a tubular inember secured to the upper end of thc lower casing, a bushing tapered throughout a portion of its length and having an annular shoulder around its upper end adapted to abut against the upper casing, said bushinr extending through the tubular member an lio o end terminating mames terminating atv its lower end within the lower casing, packing material disposed around the tapered portion of the bushing beneath the annular shoulder, and means for moving the bushing to compress the packing material to form a seal with-the upper casing. l

7. ln a packer for well pumps, an upper casing and a lower casing having its upper within the lower end of the upper casing, a tubular member secured to the upper end of the lower casing, packing material disposed above the tubular member, an elongated bushing tapered throughout a portion of its length, movable in and partially lsupported by the tubular.

member and having an annular shoulder `disposed around its upper end adapted to "abut against the upper casing above the packing, and resilient means (3o-operating with the bushing for moving it to compress the packing against the upper easing to form a seal between the two casings.

8. In a packer for well pumps, an upper casing and a lower easing havingits upper end 'terminating yWithin the lowerkend of around 'the tapered portion of the bushing beneath the shoulder, a collar disposed on the lower end of the bushing, a spring disposed around the bushing and confined at its ends between the collar and the lower end of the tubular member, said spring being capable of forcing the bushing downward to compress the packing beneath its collar when the casing is set on the well `bottom but incapable of compressing the packing when it is itself compressed by the weight of the lower casing when the latter 'is suspended in the well.

In witness whereof, ll have hereunto set my hand this 8 day of Uctober 1921.

Y ARTHUR B. STEEN. 

